Pump-valve mechanism



Sept. 30, 1924 151.0343

. A. s. HAWKS.

PUIIP VALVE mscmnus'u 11m Sept. so. 1918 2 Sna u-Shut 1' INVENTOR MW 6.

ATTORNEY A. S. HAWKS Se t, 30, 1924.

BIL M a wN 2 E \N m NH 5 v A 5 T .I I. w m AQ MN .v I J w m .m m w y MWH m m \Q\ 3 N w N V .1 I 4 -WJJFW W m EL BY w V ATTORNEY Patented Sept.30, 1924.

umreo STATES A, 1,510,143 PATENT oencs.

' ARTHUR S. HAWKS, OF ST. LOUIS, MISSOURI, ASSIGNOR TO BUSCHSU-LZERBROS.- DIESEL ENGINE COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OFMIS- SOURI.

- PUMP-VALVE MECHANISM.

Application filed September 30, 1918. Serial No. 256,295.

' To all 4.0]! am it may concern:

Be it known that I, AR'rnUmS. HAWKS, citizen of the United States,residing in St. Louis, Missouri, have invented the following describedImprovements in Pump-Valve Mechanisms. I

r The invention is a valve mechanism suitable for compressors and pumps,especially air pumps, and involving'principles which afford. a largecapacity and other advantages hereinbelow made apparent to those skilledin this art. I

In the accompanying drawings- Fig. 1 is a longitudinal section'throughalpimp cylinder having theinvention aple c p Fig. 2 a section thereof online II-II;

Fig. 3 is a perspective detail of the valve assemblage; Fig. 4 anenlarged vertical section through the pivoted valve members,illustratindifferent positions; and taken on line I IV of Fig. 5;

Fig. 5 is a section on line VV of Fig. 4;

Fig. 6 illustrates in section a modified form of valve member; and

Figs. 7 and 8 are horizontal and vertical sections respectively of thevalve mechanism of Fig. 4.-, provided with a terminal seat for the valvemembers.

In these figures a double acting pump or compressor cylinder isrepresented at 1 having a piston 2 and inlet and outlet ports 3 and 4,each equipped with valve mechanlsm according to this invention, and adellvery pipe or passage 5 receiving the discharge from the outletports. The valve mechanlsms for the inlet and outlet ports are shown asreversely-acting duplicates and each comprises one or more rectangular,adJacent, valve frames 6 formed on or bolted to the wall of the cylinderstructure in any appropriate way so as to control their respective ortpassages. There are four of such rames for each cylinder port in thecase illustrated and all are fitted close together in a common plane buttheir disposition and number as well as their shape are matters of 0design to be varied according to circumstances.

Each valve frame contains or carries an organization of imbricated valvemembers n shown at the bottom of Fig. 4 to the closed position shown atthetop of the same figure. In the closed position each louver seats byits longitudinal free edge upon the pivoted side or edge of its nextadjacent neighbor, thereby providing a series of multiple cooperatmgvalve members. The lowest louver of the series seats on a fixed ledge 9on the lower cross member of the valve frame. The valve frame as shownin Figs. 4 and 5 is com-' prised of integral top and bottom cross bars10 and narrower side bars 11 and the gudgeon pivots 13 of the severallouvers are mounted in a series of holes bored in two auxiliary sideplates 12 which are bolted to opposite sides of the frame. The ends ofthe body part or blades of the louvers are dressed ofi' square and witha very slight clearance from the flat faces of the plates, 12, in whichthey are pivoted so that the crevice between the ends of the louvers andthe surfaces of said plates in sufficiently narrow to prevent undueleakage. By making the leak path through these. narrow crevices stilllonger, as by using louvers with thicker blade portions, they becomepractically tight forall moderate pressures but other means for sealingthe crevice may be also provided as presently described. The louvers mayhave various cross-sectional shapes; those shown in Figs. 4 and 5 havingall of their blade portions on one side of their pivotal axes, areunbalanced to the pressure while those shown at 8 in Fig. 6 have part oftheir blade surfaces disposed on each side of their axes and aretherefore partly counterbalanced, that is to say, in Fig. 6 pressure .of

the fluid on the members when closed acts on each of them on oppositesides of the pivotal axis so that the pressure with which any valvemember seats upon its neighbor is the difference of the pressure actingon opposite sides of its axis and the lower side of the member being ofthe larger area, this side let formed in the edge of the guide bars 11of the valve frame, one for. each louver. Gravity returns the louversand to assist this action the lines of holes bored in the side plates 12are arranged at an inclination so that each louver may encounter itsseat on the one next below before it reaches a vertilit! cal position,thus tending to seat with some 7 gravitational pressure irrespective ofthe fluid pressure that may be acting thereon.

' pivotal axis).

to a flat section substantially like that shown in the drawings andhaving an enlarged bead alonggone side (in line with the y cutting thisstock in sections, the side beading can be readily utilized to form thepivot. The said members may also be die-cast as will be obvious.

For use at higher pressures or when the slight leakage through thecrevices at the ends of the louvers is considered objectionable, it canbe stopped entirely by an addi tional fixed seat provided in the framefor each louver blade as shown at 15 in Figs. 7 and 8. This seat isformed as a strip or ledge of any suitable material fixed to the sidebars'll and is preferably of a Babbitt metal which, by the use ofappropriate forms canbe poured directly in place when the louvers arefull closed and in the same manner as an or inary Babbitt bearing,thereby producing a plurality of end seats, each accurately fitting itscorresponding louver end and forming a close valve seatmg therefor. Asshown in the drawin the pored valve seat 15 occupies an un ercut groovein theside plate 12 whereby it is permanently and rigidly held in place.

From the foregoing descrlption of the preferred form of, the invention,it will be apparent that various modifications, additions, alterationsand subtractions and changes in the form and shape and relativearrangement of the mechanism illustrated may be resorted to withoutdeparture from the principle of the invention as broadly set forth inthefollowing claims.

,Claim's: 7 l

1. Pump valve mechanism comprising an organization of imbricated,pivoted louvers mutually cooperating. as multiple valve members and endseats for the pivoted louvers.

2'. 'Valve mechanism as in claim 1, the end seats being produced bypouring a Babbitt metal into contact with the louvers when closed.

3. Valve mechanism as in claim 1, said end seats being formed with aledge in interlocking engagement with the louver supports.

4. Pump valve mechanism comprising an organization of imbricated,pivoted louvers mutually cooperating as multiple valve members and backstops to limit the opening of the louvers to less than 90.

5. Pump valve mechanism comprising an organization of imbricated,pivoted louvers mutually cooperating as multiple valve members, theseries of louvers being disposed at an inclination providing forgravitational closing of each louver uponits neighbor.

6. Pump valve mechanism comprising a plurality of adjacent valve framesconjointly controlling a single port passa e and each frame carrying aplurality of imbrica ted valve louvers mutually cooperating as multiplevalve members whereby each valve frame and its contained louvers may beafiixed to and removed from the machine as a unit.

7. The method of manufacturing valve elements which consists inproducing a bar having a longitudinal thickening or bead along one sidethereof cutting said bar into valve lengths and trimmin the ends of thebeads to form pivots at eac end of the valve element.

8. Pump valve mechanism comprising an organization of imbricated pivotedlouvers cooperating as multi le valve-members, a seat being provided orthe lower edge of each louver and each louver comprising a blade portionand horizontal gudgeon pivots above the blade so that the closing of thelouvers is assisted by gravity.

9. A pump comprising a cylinder, a piston therein, and reversely-actingduplicate valve mechanisms for the inlet and outlet ports comprisingvalve frames containing imbricated pivoted louvers cooperating asmultiple valve members.

10. A pum valve mechanism comprising a substantial y planiform framecarrying a plurality of imbricated valve louvers coopcrating as multiplevalve members, said valve mechanism being reversible and thereby adaptedfor controlling both the suction and the discharge ports of the pump.

In testimony whereof, I have signed this specification. A

ARTHUR S. HAW'KS.

